06743: invasnab, invasnab3, invasnab4: Off-screen reloading only works on the right edge of the screen.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06743	DIP/Input	Minor	Always	Oct 30, 2017, 22:46	Sep 20, 2019, 01:17

Tester	mmarino4	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Confirmed			Driver	midway/midzeus.cpp
Version	0.191	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06743: invasnab, invasnab3, invasnab4: Off-screen reloading only works on the right edge of the screen.
Description	When reloading, MAME will only recognize an offscreen shot if you shoot near or on the right edge of the screen. The other 3 edges have no effect.
Steps To Reproduce	Start a game. Empty your first clip of ammunition. Try to reload on the top, bottom, or left of the screen.
Additional Information	Not a new issue in 0.191. Confirmed you can reload anywhere off screen on the real hardware with several videos.
Github Commit

Flags
Regression Version
Affected Sets / Systems	invasnab, invasnab3, invasnab4

Attached Files

No.15181 Hydreigon Tester Jun 18, 2018, 04:02	There are two reasons to this problem. 1. Gun mark isn't fully center the mark is slightly to the left of the cursor which doesn't make much sense to me because only up and left should be an offscreen reload in theory. 2. The fact Midway didn't include a gun calibration setting in the test menu isn't a good idea. It would be difficult to find a balance that is unless this game can use the quick offscreen reload setting that would involve remapping button 2.
No.16929 MetalGod Senior Tester Sep 19, 2019, 18:08	Tested with aimtrak guns. The issue also ocurrs. Concerning the calibration of the guns, despite this game doesn't have a calibration setup, the aimtraks can work perfectly if they are properly calibrated inside their aimtrak Windows calibration software. To reload you still have to aim to the right offscreen, and cannot take a very long distance from out of the screen anyway.
No.16939 Hydreigon Tester Sep 20, 2019, 01:17	This was kind of an issue with a lot of optical gun games. In evilngt and totlvice, offscreen reloading only works at the TOP LEFT corner of the screen. The reason for this relates to the behavior of optical guns. A shot to register offscreen means the sensor eye doesn't track the electron beam coming from the crt. Except Mame can't really emulate the whole crt and electron beam process but can emulate how gun controls, both analog and reload switch, are read. The next best solution I can think of is an interface that would consider certain analog values (five percent or so) to count as "offscreen". https://git.redump.net/mame/commit/?id=aa3c3fde69e363f960c8833e7f4bf408bc54beee I don't know how I could implement this in a lot of optical games...yet.